How will a stateful packet inspection (SPI)firewall handle a packet containing a TCP segment that contains an acknowledgement?
A) process it through the Access Control List (ACL)
B) pass it if it is part of an approved connection
C) both A and B
D) neither A nor B

Question

Quizplus · Accepted Answer

A stateful packet inspection firewall maintains information about the state of network connections, including the current sequence and acknowledgement numbers. When a TCP segment with an acknowledgement is received, the firewall checks if it is part of an approved connection and if the acknowledgement number is valid within the current state of the connection. If it meets these criteria, the packet is passed through the firewall. The packet does not need to be processed through an Access Control List (ACL) as the firewall has already determined the connection to be valid.

How Will a Stateful Packet Inspection (SPI)firewall Handle a Packet